linux-kernel - Re: [PATCH V4] audit: add tty field to LOGIN event

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Message-ID: <CAHC9VhSCTaJatWGNKr9rnbk6J+Y7OU0aaHnVOCVJ3LT+y5qcvQ@mail.gmail.com>
Date:	Thu, 28 Apr 2016 16:07:36 -0400
From:	Paul Moore <paul@...l-moore.com>
To:	Richard Guy Briggs <rgb@...hat.com>,
	Peter Hurley <peter@...leysoftware.com>
Cc:	linux-audit@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4] audit: add tty field to LOGIN event

On Wed, Apr 27, 2016 at 9:31 PM, Richard Guy Briggs <rgb@...hat.com> wrote:
> On 16/04/22, Peter Hurley wrote:
>> 2. The existing usage is always tsk==current
>
> My understanding is that when it is called via:
>
>         copy_process()
>                 audit_free()
>                         __audit_free()
>                                 audit_log_exit()
>                                         audit_log_task_info()
>
> then tsk != current.  This appears to be the only case which appears to
> force lugging around tsk.  This is noted in that commit referenced
> above.

In the case where copy_process() ends up calling __audit_free(), the
call to audit_log_exit() is conditional on the audit context
in_syscall field being true and unless I missed something, the copied
process' audit context should not have in_syscall set to true.

-- 
paul moore
www.paul-moore.com